Logistics

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Logistics consists of getting men (replacements), supplies and equipment where they need to be in order to support the fighting forces. As these are needed for an army to fight efficiently, and supply in particular is necessary for troops to just survive, logistics is of vital importance in war.

Supply Consumption

Supply Use Statistic and accompanying tooltip

Supply Consumption is a general term for the amount of supplies and equipment being expended each day by the military. The supply map mode helps to understand how much supply is being consumed/produced in a given Supply Area, and the Logistics Window will indicate how much equipment is being utilized throughout the entire nation.

Supply Use

Supply Use is the daily rate at which a unit consumes band-aids, bullets, and beans (aka, Supply).

Each division has a base level of Supply Use, which is a sum of the Supply Use of the battalions and support companies in the division's template, which is then modified by the percentage of the current manpower in the division. Finally, the level of activity of the division gives a modifier:

  • When inactive: -5%
  • When moving or in combat: +50%

Air wings and ships also have a Supply Use. These are not affected by manpower, nor activity.

Equipment Usage

In addition to consuming supplies, a unit will also lose equipment. This can happen from attrition and accidents or combat. The equipment has to be replaced through the logistics system.

Supply Area

The world map is split into 357 supply areas covering land, which consist of, usually, a couple states. Each area has its own supported supply limit on how many supplies can be delivered to the units within that area. If the requirements of the units in the area exceed the supported supply limit, then the army takes attrition and gets combat penalties. The supported supply limit is calculated by adding the following two factors.

Local supply

Local supply.

The sum of the following:

  • A base value 1-16 for the specific supply area.
  • Each named city province that has Victory Points in the supply area adds:
    • 1-9 VPs: +1
    • 10-19 VPs: +2
    • 20-29 VPs: +3
    • 30-39 VPs: +4
    • 40-49 VPs: +5

Incoming supply

Supplies can flow from the capital to the destination overland, or overland -> overseas by convoy -> overland. The supply system prefers overland routes, and determines the most efficient supply areas to go through to get there. It is not possible to control the route it takes. If the overland route would be longer than 15 supply areas, or it is impossible to reach the destination supply area because it is on a different landmass to the capital, then the system will use a supply route which includes an overseas journey by convoy.

It is important to know that there cannot be two overseas journeys involved, so the supply system cannot by-pass blocked straits.

If there is no valid route overseas, because of blocked straits, or none overland because the units are contained in a pocket surrounded by the enemy, then the units will receive no incoming supply. They also will not be able to receive any equipment or manpower replacements, reinforcements or upgrades from the logistics system.

In determining the route of supply convoys overseas, the system can use any two naval bases under friendly control, meaning they are controlled by the country itself or members of the faction a country is part of. It will favour naval bases which have higher levels, if there are more than one available.

Incoming supply is equal to the bottleneck (lowest value) on the best path from the capital including both the end supply area and the capital, meaning that low or damaged infrastructure can cripple front-line forces through inadequate logistics support. Supply areas are connected with supply values as follows:

  • Overland: Supply areas with a land adjacency. The value is the sum of:
  • 0.5 times the square of the average infrastructure in the sending supply area. Capitals do not receive this factor.
  • 2 times the square of the average infrastructure in the receiving supply area. Note that capitals get this value as "local" supply.
  • By convoy overseas: Supply areas with a convoy route connection. The maximum supply throughput is the lower of 3 times the levels of each of the naval bases in the sending and receiving supply areas. But this is modified by the efficiency of the convoy route.

Reinforcement delivery speed

Units receive manpower and equipment reinforcements slower the further they are away from the capital and the worse the supply situation in their supply area is.

The distance to the capital (measured in supply zones) reduces the reinforcement speed by up to 40% at a distance of 15 supply zones.

If the supply consumption () in the area exceeds the available supply (), the reinforcement speed gets multiplied by . The two penalties stack multiplicatively; the base speed is 100%.

Supply Area Table

Supply Area Table
Supply Area Value State Name State ID
1 12 Ermland-Masuren 5
1 12 Danzig 85
1 12 Koenigsberg 763
2 13 Warszawa 10
2 13 Poznan 86
2 13 Lodz 87
2 13 Plock 98
3 12 Krakow 88
3 12 Kielce 90
3 12 Katowice 762
4 13 Mecklenburg 61
4 13 Vorpommern 62
4 13 Hinterpommern 63
4 13 Brandenburg 64
4 13 Ostmark 68
5 13 Thüringen 60
5 13 Sachsen 65
5 13 Niederschlesien 66
5 13 Oberschlesien 67
6 13 Bohemia 9
6 13 Sudetenland 69
7 11 Western Slovakia 70
7 11 Eastern Slovakia 71
7 11 Zaolzie 72
7 11 Carpathian Ruthenia 73
7 11 Eastern Sudetenland 74
7 11 Moravia 75
7 11 Southern Slovakia 664
8 10 Nowogrodek 95
8 10 Wilejka 96
8 10 Bialystok 97
8 10 Wilno 784
9 9 Lublin 92
9 9 Wolyn 93
9 9 Polesie 94
10 11 Stanislawow 89
10 11 Lwow 91
11 14 Württemberg 50
11 14 Oberbayern 52
11 14 Niederbayern 53
11 14 Franken 54
12 15 Moselland 42
12 15 Rhineland 51
12 15 Hessen 55
13 14 Weser-Ems 56
13 14 Westfalen 57
13 14 Hannover 59
14 15 Sjaelland 37
14 15 Schleswig-Holstein 58
14 15 Jutland 99
15 14 Holland 7
15 14 Brabant 35
15 14 Friesland 36
16 14 Vlaanderen 6
16 14 Luxemburg 8
16 14 Wallonie 34
17 14 Franche-Comte 17
17 14 Champagne 18
17 14 Alsace-Lorraine 28
18 15 Ile de France 16
18 15 Centre 24
18 15 Bourgogne 27
19 15 Normandy 15
19 15 Nord-Pas-de-Calais 29
19 15 Picardy 785
20 13 Brittany 14
20 13 Loire 30
21 12 Aquitaine 19
21 12 Poitou 23
22 12 Rhone 20
22 12 Limousin 25
22 12 Auvergne 26
22 12 Centre-Sud 33
23 9 Provence 21
23 9 Alpes 32
23 9 Savoy 735
24 12 Languedoc 22
24 12 Midi Pyrenees 31
25 12 Switzerland 3
25 12 Eastern Switzerland 151
26 12 Lower Austria 4
26 12 Upper Austria 152
26 12 Tyrol 153
27 15 Piedmont 158
27 15 Lombardy 159
28 10 South Tyrol 39
28 10 Slovenia 102
28 10 Veneto 160
28 10 Istria 736
29 10 Sicily 115
29 10 Calabria 156
30 13 Latium 2
30 13 Campania 117
30 13 Abruzzo 157
31 15 Emilia Romagna 161
31 15 Tuscany 162
32 7 Albania 44
32 7 Montenegro 105
32 7 Macedonia 106
33 10 Dalmatia 103
33 10 Bosnia 104
33 10 Zara 163
34 12 Vojvodina 45
34 12 Croatia 109
35 10 Serbia 107
35 10 Morava 108
35 10 West Banat 764
36 12 Northern Hungary 43
36 12 Alföld 154
36 12 Transdanubia 155
37 9 North Transylvania 76
37 9 Crisana 83
37 9 Transylvania 84
38 10 Bessarabia 78
38 10 Moldova 79
38 10 Bucovina 80
38 10 Southern Bessarabia 766
39 11 Muntenia 46
39 11 Oltenia 81
39 11 Banat 46
40 9 Sofia 48
40 9 Dobrudja 77
40 9 Burgas 211
40 9 Plovdiv 212
41 10 Kaunas 11
41 10 Memel 188
41 10 Siauliai 189
42 10 Vidzeme 12
42 10 Harju 13
42 10 Kurzeme 190
42 10 Tartu 191
43 11 Leningrad 195
43 11 Luga 208
43 11 Volkhov 244
44 9 Rzhev 246
44 9 Kalinin 247
44 9 Tikhvin 264
45 11 Pskov 209
45 11 Nevel 210
45 11 Novgorod 263
46 7 Onega 215
46 7 Olonets 216
47 11 Uusimaa 111
47 11 Karjala 146
48 8 Pohjanmaa 149
48 8 Savo 150
49 10 Kaluga 205
49 10 Smolensk 242
49 10 Roslavl 243
50 9 Mozyr 194
50 9 Bobruysk 204
50 9 Minsk 206
50 9 Vitebsk 207
51 10 Bryansk 224
51 10 Gomel 241
52 10 Vinnytsia 198
52 10 Khmelnytskyi 199
52 10 Zhytomyr 201
52 10 Kiev 202
53 10 Odessa 192
53 10 Mykolaiv 197
53 10 Cherkasy 203
53 10 Dnipropetrovsk 226
54 10 Crimea 137
54 10 Kherson 196
54 10 Zaporozhe 200
55 10 Kharkov 221
55 10 Stalino 227
55 10 Voroshilovgrad 228
56 10 Chernigov 193
56 10 Sumy 225
56 10 Poltava 259
57 16 East Anglia 125
57 16 Greater London Area 126
57 16 Sussex 127
58 14 South-West England 123
58 14 Gloucestershire 338
59 16 West Midlands 128
59 16 East Midlands 129
60 14 Yorkshire 130
60 14 Northern England 131
60 14 Lancashire 132
61 10 Wales 122
62 12 Northern Ireland 119
63 13 Leinster 113
63 13 Connaught 134
63 13 Munster 135
64 14 Lothian 121
64 14 Lanark 133
65 10 Scottish Highlands 120
65 10 Aberdeenshire 136
66 11 Scania 138
66 11 Småland 139
66 11 Västergötland 140
67 14 Svealand 141
68 11 Gotland 124
68 11 Aland 145
69 11 Ostlandet 110
69 11 Vestlandet 142
70 7 Trondelag 143
70 7 Nord-Norge 144
71 8 Norrland 38
71 8 Lappland 666
72 5 Salla 147
72 5 Lappi 148
72 5 Murmansk 213
72 5 Petsamo 722
73 7 French Somaliland 268
73 7 Eritrea 550
74 6 Ethiopia 271
75 6 Somaliland 559
76 13 Catalonia 165
76 13 Aragon 166
77 11 Valencia 167
77 11 Murcia 168
77 11 La Mancha 175
78 11 Madrid 41
78 11 Extremadura 170
79 12 Navarre 172
79 12 Castille 176
80 12 Galicia 171
80 12 Leon 174
81 11 Porto 180
81 11 Guarda 181
82 12 Lisbon 112
82 12 Beja 179
83 10 Kursk 220
83 10 Belgorod 240
84 9 Tambov 257
84 9 Lipetsk 258
84 9 Voronezh 260
85 10 Orel 222
85 10 Tula 223
86 4 Iceland 100
87 2 Greenland 101
88 12 Gibraltar 118
88 12 Andalusia 169
88 12 Granada 173
89 9 Thessaly 47
89 9 Epirus 185
89 9 Central Macedonia 731
90 9 Thrace 184
90 9 Istanbul 341
91 10 Peloponnese 186
92 9 Dodecanese 164
92 9 Crete 182
92 9 Aegean Islands 187
93 8 Cyprus 183
94 8 Izmir 339
94 8 Bursa 340
94 8 Izmit 347
95 7 Antalya 342
95 7 Adana 344
95 7 Mersin 345
96 6 Samsun 355
96 6 Kastamonu 356
97 7 Ankara 49
97 7 Afyon 343
97 7 Konya 346
98 6 Kayseri 348
98 6 Sivas 349
99 6 Malatya 350
99 6 Van 352
100 6 Erzurum 353
100 6 Trabzon 354

Supply effects

Units require supply to function at maximum capacity. If the units in a supply area consume more supply than is supported, they will start suffering penalties in battles, in addition to the penalties of lacking manpower and equipment.

Grace period

The grace period is how long a unit can go while being cut off from supplies before it actually suffers from the lack of supply penalties. The default length of this period is 72 hours, while the Pocket DefensePocket Defense doctrine increases this by 48 hours.

Out of supply penalties

If a unit is below maximum supply, it suffers up to the following penalties:

  • up to 30% attrition
  • up to -80% movement speed
  • up to -30% recovery rate (organization regain)
  • up to -33% combat penalty

(Should include the penalty of organization reduction)

These maximum penalties are multiplied by 1 minus the supply fraction, ramping up linearly from zero to this amount over 30 days.

Logistics UI

There are two parts to the logistics UI: the supply map, and the logistics screen. The map, accessible through the shortcut F4, shows supply areas and the supported supply limit of all of the supply areas that are in the nation, occupied by it, on the coast, or bordering the nation. The logistics screen, accessible via the shortcut I, shows the nation's stockpiles of various Army, Air Force, and Navy equipment that are currently available, the deficit or surplus of those supplies, and so on.

Supply Map

Main article: supply map

The supply map is one of the game's map modes, which shows the supply areas of the world and the player's ocean going trade routes.

Logistics Window

Main article: logistics window

The logistics window is one of the main user interface screens which shows information about the country's resources and equipment.

Convoys

Convoy
1Steel 1Oil
Convoy.png


Convoys used for international trade of goods and resources. Also used to ferry troops around and for performing naval invasions.

Convoys are only used if a trade route is engaged with a nation that cannot be accessed by a direct land route within a certain range[1]. Thus, if a nation is landlocked, they may not use convoys. Convoys are created by dockyards in the production window and may be built to a set number of convoys or indefinitely just like any other naval unit. However, unlike all other naval units, they may not be deployed and are automatically stockpiled as a convoy pool. This cannot be changed. Convoys are automatically drawn from this pool as needed for trade, supply, lend-lease, and transportation of ground troops (including invasions).

Trading

Main article: Trade
Trade Slide Bar

Any country may be lacking one or more resources at any point in the game and may turn to trading to supplement them.

Note: It is not possible to conduct trade between two warring nations or if having the Closed Economy Law.

Troop Transport and Naval Invasions

In the naval units technology screen there is a line of technologies named transports. These increase the naval invasion capacity (How many troops can be used to invade from under one command and one port at a time), reduce the naval invasion penalties so that fighting may be more effective, decrease the preparation time, increase the invasion speed, and reduce troop convoy requirements. A naval invasion, once planned, will use convoys drawn from the stockpile. If there are none in the stockpile, the invasion will wait for more to be produced or released back to the stockpile from other uses. Transport convoys will be returned to the stockpile after an invasion, unless they are destroyed in transit, in which case both the convoys and any troops aboard will be lost. Selecting a group of divisions under a command will have a picture of a ship sailing next to the Strategic Redeployment order and will tell the total weight of the divisions, or how many convoys are needed to transport the divisions. Please note that transports are not specifically accumulated for a specific invasion. Thus, it is quite possible to run out of transports before the operation commences. This is particularly true if England has not fallen. Even in 1940 there can be 1000 planes over the Channel and a UK fleet of 64+ ships. This does not include French subs that have survived or the small UK sub fleet which will also focus on the Channel. In a 30 day period it is possible to lose 100+ transports in the English Channel alone.

References

  1. a range of 1000 is found in the defines, but the unit is unknown; in-game it means Switzerland just can't reach China)